Selective extraction of metal ions through liquid surfactant membranes

✍ Scribed by Ching-Yeh Shiau; Shou-Wen Jung

• Publisher: Wiley (John Wiley & Sons)
• Year: 2007
• Tongue: English
• Weight: 525 KB
• Volume: 56
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.280560106

✦ Synopsis

Abstract

Selective separation of metal ion from a liquid solution with the help of different permeation rate of solutes through liquid membranes was performed. The salts used were ZnCl~2~, CdCl~2~, NiCl~2~. D2EHPA and LIX64N were used as carrier to study the extraction rate of the solutes. The results show that at low pH value of external phase the order of degree of extraction by D2EHPA or LIX64N is Zn > Cd > Ni, while at high pH value with the presence of ammonia in the feed solution the order of degree of extraction is reversed to Ni > Cd > Zn. The results also indicate that when the mixed carrier is used an enhanced effect on the extraction was observed. Synergistic effect was also noted when comparing the cases with mixed carriers to those with pure carriers.